Sink



FIG. 1 is a perspective view of an embodiment of the claimed design;

FIG. 2 is a top view of the embodiment of FIG. 1;

FIG. 3 is a bottom view of the embodiment of FIG. 1;

FIG. 4 is a front view of the embodiment of FIG. 1;

FIG. 5 is a rear view of the embodiment of FIG. 1;

FIG. 6 is a side view of the embodiment of FIG. 1;

FIG. 7 is another side view of the embodiment of FIG. 1;

FIG. 8 is a cross-sectional view taken along line 8-8 in FIG. 2; and,

FIG. 9 is a cross-sectional view taken along line 9-9 in FIG. 2. 

CLAIM We claim the ornamental design for a sink, as shown and described. 